I think a little more information on the recording would not be unwarranted:

Rounder Records announced the re-release of "The Live Wire" - Woody Guthrie's only known live recording - on April 19. One of the most significant recent finds in folk music history, the 2008 GrammyÂ® winner for Best Historical Recording will be available solely on CD for the first time and features a PDF of the book with which this recording was first packaged.

In 2001, The Woody Guthrie Archives received 2 spools of wire recordings from a live Woody Guthrie performance held in Newark, New Jersey in 1949. With the help of many talented recording engineers, the Woody Guthrie Foundation transferred this rare live performance from a delicate wire recording to digital audio, and, with state-of-the-art technology, restored it to near-perfection.